Perhaps you should try some spelling variations:
cheng zhang » cheng han, zhen zhang, china zhang
chen zheng » chen zhen, chen aizheng, chen zhe
ming wong » ming kong, ming hung, ming qing
yan guan » gan guan, yan yuan, yang guang
wong sau » wong sam, wong siu, wong shiu
guan yi » guan li
wang » wing, wan, lang

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: wang yan guan yi ((chen zheng) or (cheng zhang)) ming wong sau ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang yan guan yi ((chen zheng) OR (cheng zhang)) ming wong sau ;*.